Looks like in Hyderabad I had read adverse reports on this service. The problem is, they collect huge amounts, before the maid is actually tested or the maid and employer compatibility is established. Most of the time it is the employer who is left loosing money and peace of mind. The employers also trust their homes and kids to total strangers, while letting in unknown domestic helpers.
The big advance payments should be done away, instead one third for a period of three months. This will build trust between all concerned.